US4255665A - Wearable device for monitoring momentary presence of intense X-ray and/or ultra-violet radiations - Google Patents
Wearable device for monitoring momentary presence of intense X-ray and/or ultra-violet radiations Download PDFInfo
- Publication number
- US4255665A US4255665A US06/115,604 US11560480A US4255665A US 4255665 A US4255665 A US 4255665A US 11560480 A US11560480 A US 11560480A US 4255665 A US4255665 A US 4255665A
- Authority
- US
- United States
- Prior art keywords
- message
- fluorescent
- radiations
- printed
- base lamina
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 15
- 241000761557 Lamina Species 0.000 claims abstract 2
- 239000003086 colorant Substances 0.000 claims abstract 2
- 239000000126 substance Substances 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Inorganic materials [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 abstract description 2
- ZIXVIWRPMFITIT-UHFFFAOYSA-N cadmium lead Chemical compound [Cd].[Pb] ZIXVIWRPMFITIT-UHFFFAOYSA-N 0.000 abstract 1
- UQMZPFKLYHOJDL-UHFFFAOYSA-N zinc;cadmium(2+);disulfide Chemical compound [S-2].[S-2].[Zn+2].[Cd+2] UQMZPFKLYHOJDL-UHFFFAOYSA-N 0.000 abstract 1
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229960000969 phenyl salicylate Drugs 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 206010042496 Sunburn Diseases 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/58—Photometry, e.g. photographic exposure meter using luminescence generated by light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/2004—Scintilloscopes
Definitions
- FIG. 1 is a plan view of a preferred embodiment of the invention.
- FIG. 2 is vertically expanded elevational view in section taken on the line 2--2 of FIG. 1.
- FIG. 3 is a plan view of a simplified form of the invention.
- FIG. 4 is a vertically expanded elevational view in section taken on the line 4--4 of FIG. 3.
- the numeral 11 generally designates a card for warning persons of the momentary presence of dangerous intensities of both ultra-violet and X-ray radiations and also of the degrees of said intensities.
- the device 11 comprises a base lamina 13 of cardboard or plastic material onto which has been laid or coated a layer 15 of fluorescent material.
- the material of the layer 15 can be any substance (e.g. lead-barium sulfate or zinc-cadium sulfide) which glows either under X-rays or under ultra-violet radiations in the sunburn range.
- the message U-V is printed with an ink containing a substance inhibitory to ultra-violet rays (e.g.
- the ink containing the inhibitory substance will be of a color (e.g. yellow) closely matching that of the layer 15 so that the message will be substantially invisible under safe-radiations conditions.
- the legend "ULTRA-VIOLET” can either be similarly printed or be printed to show as dark lettering under all conditions.
- the right half of the layer 15 is covered by a layer or coat 17 of a substance (e.g. phenyl salicylate) inhibitory (i.e. absorptive and/or reflective) to ultra-violet radiations so that the message X will be activated only by X-rays (which rays will also activate the U-V half of the fluorescent layer 15).
- a substance e.g. phenyl salicylate
- absorptive and/or reflective i.e. absorptive and/or reflective
- Each half of the layer 15 is desirably provided with steplayer-attenuation devices 19 of known constructions to indicate degrees of the radiations detected by the card 11.
- Each attenuation device 19 is formed by a plurality of stepped layers or coats 21, each containing materials partially inhibitory to the rays detected by its half of the card (e.g. phenyl salicylate for the U-V side and lead salts for the X side).
- materials partially inhibitory to the rays detected by its half of the card e.g. phenyl salicylate for the U-V side and lead salts for the X side.
- the base lamina 13 and its superposed elements 15-21 are encased between two waterproof and easily cleaned transparent plastic sheets 23, thermoplastically welded together or otherwise sealed along their margins 25.
- the simpler form of the invention disclosed in FIGS. 3 and 4 has its elements designated by primed numerals corresponding to parts bearing unprimed numerals in FIGS. 1 and 2.
- the layers or coats 26 may be formed of or printed with X-ray inhibiting material so as to show always as dark messages on a lighter (e.g. yellow) background that glows and thus brightens under X-ray activation.
- a light-transparent layer or coating 27 containing an ultra-violet-inhibiting substance overlies the layers 26 so that the X-ray messages of the elements 26 will not respond to ultra-violet radiations.
- the middle or symbol message 26 can be printed with an ink containing an X-ray inhibiting pigment and other pigments making it colorwise match the fluorescent coat 15', so as thus to be substantially invisible in the absence of X-rays.
- the ultra-violet (right) half of card 11' has a layer or coating 15' containing a material fluorescent to the selected U-V range to be monitored.
- the coating may have printed thereon the message AVOID SUNBURN with an ink containing a substance inhibitory to ultra-violet radiation and pigments selected to make the ink match the layer 15' in color (e.g. yellow).
- the message can alternatively be printed on a transparent sheet 28.
- a disc 29 can be added to serve as an attenuating device similar to devices 19 previously described. The disc 29 could be divided into halves or fourths (not shown) differently coated with U-V-inhibiting materials so as to indicate degrees of intensity of the delected U-V radiations monitored.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Laminated Bodies (AREA)
Abstract
A credit-card-size clear-plastic-encased device which can be worn or carried by a person to warn him of the momentary presence of dangerous intensitives of ultra-violet and/or X-ray radiations. A base lamina (e.g. of cardboard) is coated with a material (e.g. zinc-cadmium sulfide or lead-barium sulfate) which fluoresces under such radiations. Numerals, letters, words or symbols are printed over the fluorescent coat with a material inhibitory to said radiations so that a warning message in dark print will appear on a light background when dangerous intensities of said radiations are present. An X-ray-warning area is covered with an ultra-violet absorbing screen so that said area will glow only under X-rays (which rays will also activate the remaining ultra-violet-responsive area). The colors of the laminas and the coats are so selected that the messages are not visible when dangerous radiations are not present. If desired, only the message can be printed with fluorescent material so as to glow on a darker background. Optionally, step-layer-attenuation devices can be added to indicate degrees of radiation; and reflecting surfaces can underlie the fluorescent coat to increase efficiency and/or sensitively.
This application is a continuation-in-part of now-being-abandoned application Ser. No. 962,,244, filed Nov. 20, 1978 and entitled "Wearable Device for Monitoring X-Ray and/or UltraViolet Radiations".
Description
It is broadly old to employ a spot of material (U.S. Pat. to Winter No. 3,597,054, 8-3-71) fluorescent to ultraviolet radiations to warn persons of the presence of dangerous intensities of such radiations. It is also known to utilize such materials in relatively complicated meters (McKee U.S. Pat. No. 3,194,963) and dosimeters (Jubb U.S. Pat. No. 3,710,115). But it is not known to provide a very simple device capable of being worn by a person to give a printed-message warning of the momentary presence of dangerous intensities of one, two or more ranges of such radiations. It is the principal object of this invention to provide such a device. Other objects and advantages will appear as the following description proceeds.
FIG. 1 is a plan view of a preferred embodiment of the invention.
FIG. 2 is vertically expanded elevational view in section taken on the line 2--2 of FIG. 1.
FIG. 3 is a plan view of a simplified form of the invention.
FIG. 4 is a vertically expanded elevational view in section taken on the line 4--4 of FIG. 3.
With reference now to FIGS. 1 and 2, the numeral 11 generally designates a card for warning persons of the momentary presence of dangerous intensities of both ultra-violet and X-ray radiations and also of the degrees of said intensities. The device 11 comprises a base lamina 13 of cardboard or plastic material onto which has been laid or coated a layer 15 of fluorescent material. The material of the layer 15 can be any substance (e.g. lead-barium sulfate or zinc-cadium sulfide) which glows either under X-rays or under ultra-violet radiations in the sunburn range. On the left half of the coat or layer 15 the message U-V is printed with an ink containing a substance inhibitory to ultra-violet rays (e.g. phenyl salicylate) so that when the layer 15 is U-V activated the message U-V will appear in dark lettering on a luminescent background. The ink containing the inhibitory substance will be of a color (e.g. yellow) closely matching that of the layer 15 so that the message will be substantially invisible under safe-radiations conditions. The legend "ULTRA-VIOLET" can either be similarly printed or be printed to show as dark lettering under all conditions.
The right half of the layer 15 is covered by a layer or coat 17 of a substance (e.g. phenyl salicylate) inhibitory (i.e. absorptive and/or reflective) to ultra-violet radiations so that the message X will be activated only by X-rays (which rays will also activate the U-V half of the fluorescent layer 15).
Each half of the layer 15 is desirably provided with steplayer-attenuation devices 19 of known constructions to indicate degrees of the radiations detected by the card 11. Each attenuation device 19 is formed by a plurality of stepped layers or coats 21, each containing materials partially inhibitory to the rays detected by its half of the card (e.g. phenyl salicylate for the U-V side and lead salts for the X side). Thus the blocked areas 1, 2,3,4 of each attenuation device 19 will be actuated serially as the intensity of its detected radiation increases: "1" for low, "12" or "123" for moderate and "1234" for high levels, respectively.
The base lamina 13 and its superposed elements 15-21 are encased between two waterproof and easily cleaned transparent plastic sheets 23, thermoplastically welded together or otherwise sealed along their margins 25.
The simpler form of the invention disclosed in FIGS. 3 and 4 has its elements designated by primed numerals corresponding to parts bearing unprimed numerals in FIGS. 1 and 2. The layers or coats 26 may be formed of or printed with X-ray inhibiting material so as to show always as dark messages on a lighter (e.g. yellow) background that glows and thus brightens under X-ray activation. A light-transparent layer or coating 27 containing an ultra-violet-inhibiting substance overlies the layers 26 so that the X-ray messages of the elements 26 will not respond to ultra-violet radiations. The middle or symbol message 26 can be printed with an ink containing an X-ray inhibiting pigment and other pigments making it colorwise match the fluorescent coat 15', so as thus to be substantially invisible in the absence of X-rays.
The ultra-violet (right) half of card 11' has a layer or coating 15' containing a material fluorescent to the selected U-V range to be monitored. As in FIGS. 1 and 2, the coating may have printed thereon the message AVOID SUNBURN with an ink containing a substance inhibitory to ultra-violet radiation and pigments selected to make the ink match the layer 15' in color (e.g. yellow). But as shown in FIG. 4, the message can alternatively be printed on a transparent sheet 28. A disc 29 can be added to serve as an attenuating device similar to devices 19 previously described. The disc 29 could be divided into halves or fourths (not shown) differently coated with U-V-inhibiting materials so as to indicate degrees of intensity of the delected U-V radiations monitored.
While the device has been shown in the form of a card, it should be noted it could have a cylindrical or spherical base lamina, if desired.
Claims (14)
1. A device for warning persons of the momentary presence of dangerous intensities of at least two separate distinct ranges of radiant energies, comprising: a base lamina; material, fluorescent to said separate distinct ranges of radiant energies, positioned adjacent a surface of said base lamina in patterns defining separate visual message areas; and at least one material, inhibitory to at least one of said ranges of radiant energies, covering at least one message area to prevent a fluorescent message from emanating therefrom, whereby said warning device can at least partially identify the nature of radiant energies being detected.
2. A device according to claim 1, said base lamina being relatively flat.
3. A device according to claim 2, certain of said message areas being on opposite faces of said base lamina.
4. A device according to claim 3, said opposite faces of said base lamina being protectively covered by transparent laminas.
5. A device according to claim 2, at least the fluorescent-message face of said device being protectively covered by a transparent lamina.
6. A device according to claim 1, said base lamina being so shaped that the outlines of certain planar cross-sections thereof would define wide closed-line figures.
7. A device according to claim 1 with at least portions of at least one of said message areas being covered by attenuating inhibitory means to indicate varying intensities of the radiation detected.
8. A device according to claim 1, said messages being at least partly in the form of printed symbols.
9. A device according to claim 7, said messages being at least partly in the form of printed words.
10. A device according to claim 1, said message areas being covered by said fluorescent material and being printed-over by radiation-inhibiting substance to provide a dark message on a fluorescent background.
11. A device for warning persons of the momentary presence of dangerous intensities of certain radiant energies, comprising: a base lamina; material, fluorescent to at least one distinct range of potentially dangerous radiant energy, positioned over said base lamina so as to define a message in printed form thereon; and at least one lamina, transparent to said at least one distinct range of radiant energy and to the visible light to be emitted by said fluorescent material, protectively covering at least the message surface of said base lamina.
12. A device according to claim 11, said printed message being delineated by said fluorescent material on a background free of said material but matching said material colorwise so as to be substantially invisible under safe-radiations conditions.
13. A device according to claim 11, said base lamina having a message area covered by said material and said printed message being delineated by substance inhibitive to said radiant energy so as to provide a darker printed message on a fluorescent-lightened background when detectingly energized.
14. A device according to claim 13, said message area and said inhibitory substance being of substantially matching colors so that said printed message will be substantially invisible under safe-radiations conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/115,604 US4255665A (en) | 1980-01-28 | 1980-01-28 | Wearable device for monitoring momentary presence of intense X-ray and/or ultra-violet radiations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/115,604 US4255665A (en) | 1980-01-28 | 1980-01-28 | Wearable device for monitoring momentary presence of intense X-ray and/or ultra-violet radiations |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05962244 Continuation-In-Part | 1978-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4255665A true US4255665A (en) | 1981-03-10 |
Family
ID=22362387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/115,604 Expired - Lifetime US4255665A (en) | 1980-01-28 | 1980-01-28 | Wearable device for monitoring momentary presence of intense X-ray and/or ultra-violet radiations |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US4255665A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4701622A (en) * | 1982-03-19 | 1987-10-20 | Canon Kabushiki Kaisha | Fluorescent screen having a variation in sensitivity and method of manufacturing the same |
| EP0565480A2 (en) * | 1992-04-10 | 1993-10-13 | Angewandte Digital Elektronik GmbH | Indication of improperly treated chipcards |
| US20070007467A1 (en) * | 2003-04-28 | 2007-01-11 | Wong Tommy C | Ultra violet detector/indicator |
| US20110116076A1 (en) * | 2009-11-13 | 2011-05-19 | Lincoln Global, Inc. | Welding arc apparel with uv activated images |
| US9121776B2 (en) | 2009-11-13 | 2015-09-01 | Lincoln Global, Inc. | Welding arc apparel with UV or thermochromic activated images |
| US9798458B2 (en) | 2013-10-02 | 2017-10-24 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US9880052B2 (en) | 2013-10-02 | 2018-01-30 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| USD829112S1 (en) | 2016-08-25 | 2018-09-25 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Sensing device |
| US10527491B2 (en) | 2015-08-25 | 2020-01-07 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US10739253B2 (en) | 2016-06-07 | 2020-08-11 | Youv Labs, Inc. | Methods, systems, and devices for calibrating light sensing devices |
| US10876886B2 (en) | 2018-10-19 | 2020-12-29 | Youv Labs, Inc. | Methods, systems, and apparatuses for accurate measurement of health relevant UV exposure from sunlight |
| GB2605880A (en) * | 2021-04-16 | 2022-10-19 | Saf T Glo Ltd | Indicator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2459694A (en) * | 1944-09-02 | 1949-01-18 | Joseph M Gordon | Structure for fluorescent dial panel and method of making the same |
| US2509766A (en) * | 1947-01-24 | 1950-05-30 | Gen Aniline & Film Corp | Color film for normally invisible radiations |
| US2616051A (en) * | 1949-05-31 | 1952-10-28 | Wisconsin Alumni Res Found | Thermoluminescence radiation exposure meter |
| US2949880A (en) * | 1958-07-17 | 1960-08-23 | Fromer Stephen | Suntan control device |
| US3194963A (en) * | 1961-07-17 | 1965-07-13 | Sundstrand Corp | Light intensity measuring device and method using 2-(2', 4'-dinitrobenzyl)-pyridine |
| US3597054A (en) * | 1969-12-17 | 1971-08-03 | Peter Mcgowin Winter | Ultraviolet warning spectacles |
-
1980
- 1980-01-28 US US06/115,604 patent/US4255665A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2459694A (en) * | 1944-09-02 | 1949-01-18 | Joseph M Gordon | Structure for fluorescent dial panel and method of making the same |
| US2509766A (en) * | 1947-01-24 | 1950-05-30 | Gen Aniline & Film Corp | Color film for normally invisible radiations |
| US2616051A (en) * | 1949-05-31 | 1952-10-28 | Wisconsin Alumni Res Found | Thermoluminescence radiation exposure meter |
| US2949880A (en) * | 1958-07-17 | 1960-08-23 | Fromer Stephen | Suntan control device |
| US3194963A (en) * | 1961-07-17 | 1965-07-13 | Sundstrand Corp | Light intensity measuring device and method using 2-(2', 4'-dinitrobenzyl)-pyridine |
| US3597054A (en) * | 1969-12-17 | 1971-08-03 | Peter Mcgowin Winter | Ultraviolet warning spectacles |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4701622A (en) * | 1982-03-19 | 1987-10-20 | Canon Kabushiki Kaisha | Fluorescent screen having a variation in sensitivity and method of manufacturing the same |
| EP0565480A2 (en) * | 1992-04-10 | 1993-10-13 | Angewandte Digital Elektronik GmbH | Indication of improperly treated chipcards |
| US20070007467A1 (en) * | 2003-04-28 | 2007-01-11 | Wong Tommy C | Ultra violet detector/indicator |
| US7479641B2 (en) * | 2003-04-28 | 2009-01-20 | Tommy Chi-Kin Wong | Ultra violet detector/indicator |
| US20110116076A1 (en) * | 2009-11-13 | 2011-05-19 | Lincoln Global, Inc. | Welding arc apparel with uv activated images |
| US8284385B2 (en) | 2009-11-13 | 2012-10-09 | Lincoln Global, Inc. | Welding arc apparel with UV activated images |
| US9121776B2 (en) | 2009-11-13 | 2015-09-01 | Lincoln Global, Inc. | Welding arc apparel with UV or thermochromic activated images |
| US9880052B2 (en) | 2013-10-02 | 2018-01-30 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US9798458B2 (en) | 2013-10-02 | 2017-10-24 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US9880725B2 (en) | 2013-10-02 | 2018-01-30 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US10527491B2 (en) | 2015-08-25 | 2020-01-07 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US10527490B2 (en) | 2015-08-25 | 2020-01-07 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure |
| US10739253B2 (en) | 2016-06-07 | 2020-08-11 | Youv Labs, Inc. | Methods, systems, and devices for calibrating light sensing devices |
| USD829112S1 (en) | 2016-08-25 | 2018-09-25 | The Joan and Irwin Jacobs Technion-Cornell Innovation Institute | Sensing device |
| US10876886B2 (en) | 2018-10-19 | 2020-12-29 | Youv Labs, Inc. | Methods, systems, and apparatuses for accurate measurement of health relevant UV exposure from sunlight |
| US11353361B2 (en) | 2018-10-19 | 2022-06-07 | Youv Labs, Inc. | Methods, systems, and apparatuses for accurate measurement of health relevant UV exposure from sunlight |
| US11428572B2 (en) | 2018-10-19 | 2022-08-30 | Youv Labs, Inc. | Methods, systems, and apparatuses for accurate measurement of health relevant UV exposure from sunlight |
| GB2605880A (en) * | 2021-04-16 | 2022-10-19 | Saf T Glo Ltd | Indicator |
| US11719574B2 (en) | 2021-04-16 | 2023-08-08 | Saf-T-Glo Limited | Indicator |
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